Query to a list doesn't work

Question

I want to get the number of comments from the list "Comments" of a blog site. To do that, I have a query with this code:

 using (SPWeb oWebsite = oSiteCollection.OpenWeb(new Guid(WebId)))
                { 
                    SPList oList = oWebsite.Lists["Comentarios"];

                    if (oList.ItemCount > 0)
                    {
                        var query = new SPQuery()
                        {
                            Query = "<Query><Where>" +
                                        "<Eq>" +
                                            "<FieldRef Name='ows_PostID' LookupId='TRUE'/>" +
                                            "<Value Type='Lookup'>" + IDEntryBlog + "</Value>" +
                                        "</Eq>" +
                                    "</Where></Query>",
                           // ViewFields = "ID",
                            //ViewFieldsOnly = true,
                            IncludePermissions = false,
                            RowLimit = BlogInfo.MaxNumberOfComments
                        };
                        SPListItemCollection items = oList.GetItems(query);
                        ncomments = items.Count;
                    }
                }

I always receive the total number of elements. Have a look to the xml content of items: http://pastebin.com/g2nGpLKj

What am I doing wrong?

Answer 1

Your code looks like Server Object Model. Based on my experience on using CAML queries, I can suggest you to get rid of <Query> tags. So update your query as below

Query = "<Where>" +
                "<Eq>" +
                    "<FieldRef Name='ows_PostID' LookupId='TRUE'/>" +
                    "<Value Type='Lookup'>" + IDEntryBlog + "</Value>" +
                "</Eq>" +
        "</Where>"  

Answer 2

This is the code generated by the tool that @Atish commented. Note the "at"

SPList list = web.Lists[new Guid("d4dd7678-6dd9-47de-9d0c-951368081bdf")];
var q = new SPQuery()
{
    Query = @"<Where><Eq><FieldRef Name='PostID' /><Value Type='Lookup'>3</Value></Eq></Where>"
};


var r = list.GetItems(q);